I've got a problem that I hope someone here can shed some light on.

It seems that in any calls going over Zap channels (either with a FXO card or 
PRI card), 
inbound audio is constantly monitored for DTMF tones, and then these tones are 
regenerated back in the audio stream either within * if the endpoint is set for 
inband 
dtmfmode, or sent out-of-band for the endpoint to regenerate.

I have two applications where this has disasterous results: 
  1. Connecting to another system that does a lot of DTMF signaling
  2. Trying to use an iaxmodem and hylafax to receive faxes.

The DTMF detection code easily falses and at least mutes the audio.

I realize there are certain things (like the IVR) that require the DTMF 
detection; but on 
calls from the zap channel to an endpoint, I can't have it muting the audio, 
and 
potentially regenerating the tones.  Perhaps this could be configurable per 
extension 
entry?

I think I recall seeing something that looked for the fax initial tone, and 
would at 
least disable any echo cancellation - does that also disable DTMF regeneration?

I appreciate any help or pointers!

Joe

____________________________________________________________
Click to go wireless with your computer, ultra fast speed.
http://thirdpartyoffers.netzero.net/TGL2231/fc/Ioyw6ijmWbww9f2hhX4f2TcPxLtgcLJ4DlAvmab8VmG43fIiATJTRp/

_______________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --

AstriCon 2008 - September 22 - 25 Phoenix, Arizona
Register Now: http://www.astricon.net

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
   http://lists.digium.com/mailman/listinfo/asterisk-users

Reply via email to